马桂花是贫困地区众多因经济困难而面临失学的孩子中的一个，但她不愿屈服于命运，她利

java.io包的File类是【 】

A．字符流类

B．字节流类

C．对象流类

D．非流类

文言阅读

       先生不知何许人也，亦不详其姓字，宅边有五柳树，因以为号焉。闲静少言，不慕荣利。好读书，不求甚解；每有会意，便欣然忘食。性嗜酒，家贫不能常得。亲旧知其如此，或置酒而招之；造饮辄尽，期在必醉。既醉而退，曾不吝情去留。环堵萧然，不蔽风日；短褐穿结，箪瓢屡空，晏如也。常著文章自娱，颇示己志。忘怀得失，以此自终。

       赞曰：黔娄之妻有言：“不戚戚于贫贱，不汲汲于富贵。”其言兹若人之俦乎？衔觞赋诗，以乐其志。无怀氏之民欤？葛天氏之民欤？

1．解释下列加横线词的意思。

     ①环堵萧然（            ） ②短褐穿结（            ） ③晏如也（            ）

     ④造饮辄尽（            ） ⑤兹若人之俦乎（            ）

2．翻译下列句子。

     ①好读书，不求甚解。

     ②不戚戚于贫贱，不汲汲于富贵。

3．文章叙述了五柳先生有两个主要的爱好：一是                 ，达到了                 的程度；二

     是                  ，达到了________的程度。（用原文回答）

 4．说说你对五柳先生“不慕荣利”的看法。 有人说：“当今社会，经济地位决定一个人的生存质量，

      陶渊明的理想追求早已与时代格格不入了。”对此你是怎么看的？

I have nothing to say about whether or not “A Day Without Immigrants(移民)” had a positive or negative effect on the question of how the federal government should deal with the huge population of undocumented illegal immigrants in this country. I'll leave that question to others.

Regardless of how you feel about the event, one conclusion is obvious. Using the theme of “A Day Without” as a way to focus national attention on a particular subject is a great idea, and could serve as a method for increasing public consciousness about other issues that affect daily life in America. Here are my top three examples:

“A Day Without Speeding.” How hard could this be? If all drivers would strictly obey every posted speed limit on highways, downtown, on neighborhood streets, and in parking lots for one 24-hour cycle, the benefits would be huge.

“A Day Without Losing Your Temper.” A higher degree of difficulty here, and I know that from personal experience. When something goes wrong at home or on the job, there may be brief satisfaction in yelling or kicking the furniture, but bursting into anger usually has nothing to do with the approach to the heart of the matter.

“A Day Without Having All The Answers.” I would like to get a break from hearing anyone speak the phrase, “Here’s what you’re doing wrong.” Right now the US is packed with citizens who believe they can point out the cause of every single problem in existence and then solve it in a moment. I believe they need to be quiet sometimes and use their ears instead of their voices.

I wonder how would average Americans react to such a national pause? Would it be a day of reaction against anger, or joyful celebrations?

小题1:The first paragraph suggests ________.

A．the writer is against “A Day Without Immigrants”

B．immigrants are not equally treated by the US government

C．the immigrants issue is so complex that the author has to refer to others

D．some move to America without the permission of the US government小题2:The author uses his “top three examples” to________.

A．criticize the undocumented illegal immigrants in America

B．show public consciousness of some subjects could be raised

C．encourage common people to create more similar activities

D．indicate some bothering issues affecting people’s daily life小题3:According to the author, losing one’s temper is ________.

A．unpleasant

B．pointless

C．relaxing

D．personal小题4:The writer suggests “a day without having all the answers”, because ________.

A．he thinks the Americans are too proud

B．he wants to have a chance to speak his mind

C．he expects others to keep quiet and calm

D．he hopes to get a break from the problems

将等物质的量的A、B混合于2 L的密闭容器中，发生如下反应：3A(g)+B(g) xC(g)+2D(g)，经5 min后，测得D的浓度为0.5 mol/L，c(A)∶c(B)＝3∶5，C的平均反应速率是0.1 mol/(L·min)。求：

(1)此时A的浓度及反应开始前放入容器中A、B的物质的量；

(2)B的平均反应速率；

(3)x值是多少？

人体MRI最常用的成像原子核是（）。

A.氢原子核

B.钠原子核

C.钙原子核

D.磷原子核

E.氮原子核